"Children are arriving at nursery school able to 'swipe a screen' but lack the manipulative skills to play with building blocks, teachers have warned. They fear that children are being given tablets to use 'as a replacement for contact time with the parent' and say such habits are hindering progress at school. Addressing the Association of Teachers and Lecturers conference in Manchester on Tuesday, Colin Kinney said excessive use of technology damages concentration and causes behavioural problems such as irritability and a lack of control."